Switch-board



(No Model.)

J. W. KELLY.

SWITCH BOARD.

No. 399,269. Patented Mar. 12, 1889.

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UNITED STATES PATENT IEETCE.

JIIN KELLY, OF MINNEAPOLIS, MlNNliStl'l'i-i SWITCH=BGARD SPECIFICATION forming part of Letters Patent No. 399,269, dated March l2, 1889.

Application filed March 1S, 1888A To (LIZ zr/71,011 ff 71mg/ Concern:

Be it known that I, JOHN lV. KELLY, a eitizen ot. the United States, and a resident of the oity ot' Minneapolis, County ot' llennepin, State Serial No. 267,129. (No model.)

respertively, at the haeh ot the hoard to the of illinnesota, have invented a eertain new i and useful Switch-Board for Eleetrio-Iiight Stations, of which the following is a speeitication, reference being' had to the aeeompanying drawings.

My invention was ilesigned more especially for use in eleetrie-light stations, and it has t'or its ohjeet to provide a switch-board whieh several d vnainos to the saine, lamp-eireuit, or l of Cutting out one dynamo and throwing' in I another without stopping; the lights, or ot' eonneeting` togeth er several lainp-eireuits th rough one dynamo or the several dynainos and the several lamp-eireuits.

hereinafter fully described, and partieularly pointed ont in the elaim.

In the drawings, like letters referring to like L positive and negative eonduetors of the lampeireuits. These binding-posts are preferably arranged in line at one end ot.' the board and are provided on their taee ends with means, as an eyelet, t'or the ready attachment of a Cable or loop wire. H, for eoupling` lamp-Circuits.

It should be further noted that the lampeonduetors and the dyn:nno-eoiuluetors cross eaeh other. It is preferable to have them f eross eaeh other ati right angles, though it is will at'tord a eonvenient means ot' eonneeting' not neeessary that the angle should he at a right angle.

To the t'aee ends ot' the Vhindiiig-lnists l l" are pivoted the eustomary Contact-strips, l li', with ting-er-pieees ol hard rubber.

l. L are positive and 'negative bindingposts attached at the baek of the slab,1e ).[y invention consists of the eonstruetion speetiively, to the positive and negative dynamo-eoilduetors and proieetine' through the board with their outeror i'aee ends above the saine inthe proper position to he reaehed by the free ends ot' the eontaet-strips Ii and II, respectively.

1li are small stops in the faee ot the board in the proper position to limit the movement of; the ontaet-strips I( if and prevent aeei- B B and C C are pairs ot' parallel metallic strips eonstitntin parts of the Conductors bb and c C from two independent dynainos. (Not. shown.)

positive wire 0f each Circuit being eonneeted l i l t l t t l i i i to one set of binding-posts, as D to F, and the negative wire ot' each eireuit Connected to the l other set of binding-posts, as il to F, respeetively.

It should be vfurther noted that these positive and negative sets ot' binding-posts are on the opposite sides of the dynamo-Circuits.

G G are an independent set of bindingposts, positive and negative, respectively, passing; through the slab A, and connected,

dental eontaets.

N are wooden strips pro'ieetineI from the baehV ot' the lmard between all the wires ot` p the lanip-eireuits 'or the bet ter prevent ion ot' i aeehlental eontaeis.

D D and E E are parts of pairs of eonduet-ors eonstitutingI independent eireuits The opm'ation ot' the board is illustrated in Figs. l. L), and 3, attention being` direeted to the `I'ull and dotted line positions ol? the pivoted eontz'ietestrips and vthe eable ll. The Cable llV not beine' used and the pairs ot' pivoted eontaets lieing'in the position shown in Fig'. l, the iiulependent dynamos will be eonneeteffl each to an independent lamp-eirenit. It the Cable benot used and the pivoted eontaets he in the tull-line position shown in Fig. ,l oth dynamos will be on the one lamp-eireuit D 1). It' the Cable be thrown in g and the pivotal eontaets be in the positions as shown in Fig. Il, all the lamps will be veonpled to a single dynamo. while if the IOO cable be used as shown in Fig. 3, all the lamps and all the dvnamos will be thrown into a single continuous circuit.

The board, as shown, represents the arrangement ot' the conductors and connections for two dynamos and two sets of lamps. It is evident, however, that the principle would be the same for an indefinite number. All that is necessary is to extend the board sidewise and lengthwise and multiply the lamp and dynamo conductors, the binding-posts, and pivoted contacts. In so doing the essentials are to make all the lamp-wires cross all the dynamo-wires, to have a positive binding-post for every positive lamp wire protruding through the switch-board adjacent to every positive dynamo-wire, a negative bindingpost from every negative lamp-wire adjacent to every negative dynamo-wire, corresponding,` positive and negative con tact-points protruding Jfrom the dynamo-wires, the requisite pivoted contact-stri ps for connectin g the lamp and dynamo binding-posts, an independent set of positive and negative binding-posts proj ectin g' through the board from the various positive and negative lamp-wires, and a cable for coupling.. the same together. This last feature is only necessary in order to make the board universal for the purpose of connecting two or more of the lamp-circuits together into one circuit through one or more of the dynamos. Any one or all of the dynamos whose conductors are crossed by the conductors of a given lamp-circuit may be thrown onto that particular lamp-circuit without the use of any cable, and wh ere several di tterent dynamos and several different lamp-circuits are used it is evident that all ordinary requirements in the way of re-entorcement of dynamos or substitution of dynamos may be made without the use of any cable.

rIhis board is a great convenience in electric-light stations, where it is often desirable to substitute one dynamo for another. Hitlierto it has'been difiicult to do this without putting' out the light-s. Itis evident that this substitution can be readily effected by my device. The substitute dynamo'may be coupled onto the lamp-circuit in multiple with the old one for a moment and then the old one taken off. It is capable of a wide diversity of other uses, both in electric-light stations and in other places, as is evident from the previously-described constructions.

While dynamos are spoken of throughout the specification and lamps as the points of distribution or use, it will of course be understood that these terms are not Words of limitation, but merely words of illustrative use. The conductors h h and c c' are intended, broadly, as source conductors and the Wires D D' and E E' as distribution-conductors, taking the electricity wherever required for any kind of use.

That I claim, and desire to secure by Letters Patent of the United States, is as follows:

In a switch-board, the combinationnvith two or more sets of source conductors, as l) b' and c c', of two.or`more sets of distributing-conductors, as D D and E E', crossing' said source conductors on the switch-board, sets ot' binding posts or contacts, as L L', project-ing` from said source conductors through the face of the board corresponding' in number on each set of source conductors to the sets of distributi11g-conductors, set-s of binding posts or contacts, as F F', projecting' from said distributing-comluctors through the face of the board in proximity to the sets of said source contacts corresponding in number on each set of distributing` conductors to the sets ot' source-conductors, pivoted contacts, as K K', adapted to connect L L' and F F', or such ot' them as desired, an independent series ot' binding posts or contacts, as G G', attached to and corresponding` in number to the distributing-conductors, and a removable cable, H, adapted to connect any set of the same together, substantially as described.

JOHN w KELLY.

In presence of- JAs. F. WILLIAMsoN, EMMA F. ELMORE. 

